Given \( \sin \theta=\frac{3}{5} \) and \( \cos \theta>0 \), find \( \tan \theta \) and \( \sec \theta \).
Since \( \cos \theta>0 \), we know that \( \theta \) is in the first or fourth quadrant. Since \( \sin \theta=\frac{3}{5} \), we know that \( \theta \) is in
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